intertwine the ribbons
to enter into an agreement (with any one)
to contract a friendship with one―form an acquaintance with a person―make one's acquaintance
ひもを結ぶ
to conclude peace with the enemy
ひもをほどく
to end―come to an end―come to a close―come to a termination―come to a conclusion―come to a settlement
結婚する.